Description:
Knurled nuts, plastic.

Material:
- Black thermoset PF 31
- tapped bush brass.

Version:
- Tapped bush nickel-plated.

Dimensions:
- Thread D: M4
- D1: 18 mm
- D3: 10 mm
- D4: 7 mm
- H: 13 mm
- K: 8 mm
- T: 9 mm.